jamaica. >> after a while, every stroke i look at that boat for hours and say, stay closer, stay closer, stay here, stay here. so i drift. every time i swim 30, 40, 50 yards that way and back, we're going to add in miles and miles. >> reporter: and that could mean the difference between success and failure. this woman literally just exudes inspiration. we spent the past year-and-a-half following diana as she prepared to do something no human has ever done before. see how it all went down. last, but not least for thus morning, here on "sgmd," a real thrill for me. i got to try my hand at acting in the new movie "contagion." i was myself, of course. and right after the break, the candid conversation with my co-star, kate winslet. also a virus expert lori garrett who consulted on the film joins us as well. could an outbreak like the one depicted in this movie actually happen? almost tastes like one of jack's cereals.